Smoke rises from burning railroad cars carrying crude oil after they derailed in downtown Lac Megantic, Quebec, on Saturday, July 6, 2013. A large swath of the town was destroyed, and up to 1,000 people were forced to evacuate. (AP Photo/The Canadian Press, Paul Chiasson)

Photo by: Paul Chiasson

Smoke rises from burning railroad cars carrying crude oil after they derailed in downtown Lac Megantic, Quebec, on Saturday, July 6, 2013. A large swath of the town was destroyed, and up to 1,000 people were forced to evacuate. (AP Photo/The Canadian Press, Paul Chiasson)